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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A119304 Triangle read by rows: T(n,k) = binomial(4n-k,n-k), 0 <= k <= n.

Table of values

n a(n)
0 1
1 4
2 1
3 28
4 7
5 1
6 220
7 55
8 10
9 1
10 1820
11 455
12 91
13 13
14 1
15 15504
16 3876
17 816
18 136
19 16
20 1
21 134596
22 33649
23 7315
24 1330
25 190
26 19
27 1
28 1184040
29 296010
30 65780
31 12650
32 2024
33 253
34 22
35 1
36 10518300
37 2629575
38 593775
39 118755
40 20475
41 2925
42 325
43 25
44 1
45 94143280
46 23535820

List of values

[1, 4, 1, 28, 7, 1, 220, 55, 10, 1, 1820, 455, 91, 13, 1, 15504, 3876, 816, 136, 16, 1, 134596, 33649, 7315, 1330, 190, 19, 1, 1184040, 296010, 65780, 12650, 2024, 253, 22, 1, 10518300, 2629575, 593775, 118755, 20475, 2925, 325, 25, 1, 94143280, 23535820]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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